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Re: Some ideas about new features of grub

From: Robert Millan
Subject: Re: Some ideas about new features of grub
Date: Sat, 11 Jul 2009 20:55:22 +0200
User-agent: Mutt/1.5.18 (2008-05-17)

On Sat, Jul 11, 2009 at 07:32:36PM +0100, Colin Watson wrote:
> On Sat, Jul 11, 2009 at 06:20:13PM +0200, Michal Suchanek wrote:
> > The other problem is that scripts like os-prober that use linux
> > filesystem code for probing filesystems destroy your data.
> > 
> > Linux cannot mount journalled filesystems readonly. It always modifies
> > them. The extent of the modifications and the impact may vary
> > depending on the state of the filesystem (clean/mounted) and the way
> > you are going to use it in the future (resume the system/fresh boot)
> > but until Linux people implement readonly filesystem support any Linux
> > based os-probers cannot be recommended.
> I'm pretty sure this is fixable with blockdev --setro. The main reason
> we haven't got round to doing this in os-prober yet is that we need to
> get round to adding blockdev to busybox (which is important for
> os-prober's original purpose, the Debian installer).

Does D-I use os-prober for anything other than GRUB ?  With grub-pc, it
doesn't need to invoke os-prober directly, installing it to the target
system would be enough.

Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."

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